It just so happens a good number of the MoFi's I bought were made without the digital conversion step: the three Ry Cooder's, for instance.
But ya know, a lot of original mastering jobs used an intermediary copy tape as the source---what's called a production or safety master---not the original 2-track mixdown tape. A MoFi digital file---made off a 1st or even 2nd generation analogue tape---may sound better than does the tape the original lacquer was cut from.
MoFi claims they found the above to be true, but they didn't disclose that fact to the public, knowing that audiophiles would then perhaps not buy their LP's. A lot of them are no longer going to, that's for sure.